shipping clerk vs clerk

shipping clerk and clerk both are nouns.

Word	Noun	Adjective	Verb	Adverb
shipping clerk	Yes	No	No	No
clerk	Yes	No	Yes	No

As nouns, clerk is a hypernym of shipping clerk; that is, clerk is a word with a broader meaning than shipping clerk:

shipping clerk: an employee who ships and receives goods
clerk: an employee who performs clerical work (e.g., keeps records or accounts)

shipping clerk (noun)	clerk (noun)
an employee who ships and receives goods	an employee who performs clerical work (e.g., keeps records or accounts)
	a salesperson in a store

shipping clerk (verb)	clerk (verb)
	work as a clerk, as in the legal business